Click box



April 2, 1929.

Filed Ju1y17, 1925 AWWA/fk5.

Patented Apr. 2, 'i

UNITED sTArss PATENT oFFiCE,

RALPH HOHNHORST AND GEORGE LANGEN, F CINCINNATI, OHIO., ASSIGNORS TO 'THE CINCINNATI PLANER COMPANY, INCINNATI, OHIO, A CORPORATION OHIO.

. CLICK BOX.

Our invention relates to clickl rboxes in general and particularly to a novel click box adapted to control the movementof the pawl which regulates a'clicker gear on a metal planer. f v f It is the object of our invention to provide a simplified and improved click box for metal planers whichl avoids the use of external pin posts and the danger to the oplo era'tor incident thereto, and whichembodies among other features a rotary Cover cap for Controlling the operation ofthe Clicker pawl, 'which cap is connected to and encloses a pawl gear and pinion and provides a rela i5 tively Wide range of movement of the part grasped by the operatoi' as hereinafter set forth. I

In the past, the conti'ol of the pawl element which operates the Clicker gear has been usually accomplished by disposing pin posts on a housing enclosing the Clicker gear. v As two or more Clicker gears have been required for the several motions imparted to thetool holders, there have often been two or more pin posts in close proximity to eachother on they -outer side of the housing. l/Vhen anv operator sought to adjust one of the pin posts he was likely to be in dangerof havingy his fingers caught between two of the pins; It is primarily to avoid this likelihood that our invention is adapted. Further we have constructed a Cap member with gearing permitting an increased movement of the cap over that which would be possible were the 'f cap to be provided with internal teeth operating directly .oni a pinion the end of thepawl shaft.

yReferring to the 'drawing in rwhich' we preferred structure ofv have illustrated a click box :l

Figure 1 isa perspectiveview of a planer housing showing the usualA position of the Clicker gearbox.

Figure 2 is a section through a Clicker gear box as indicated by the line -2-2 in Figure 1.

Figure 3 is an end yelevation of a Clicker gear mechanism as itvwould appear' if the cap member shown in Figure 2* and theexternal collar were removed Y The Clicker box mechanism lis mounted on a stud 1. `A lspindle 2 is mountedon the stud, the preferred mounting being pro' vided by a bushing 3 in a recess in the are provided in the well known way for ,grooveQ ofv the gear adjacent thesleeve are positioned von conveniently have a knuiled surface,lrotates j `l the collar 13; The gear teeth 14 of the col- Aused to secure thcspindle-to a sleeve 5 which has a clutch ymechanism 6 at the end toward the mounting stud. rlhe Clotch i'ncchanism'4 transmits the power for moving the cutting tool of the planer. 1 The purpose of the Clicker gear is to enable an operator to ad- 'rance the cutting` tool a certain distancefor each alternate lreciprocating stroke of the table. Suitableshaft and gear mechanism moving a gear 7 rotatively mounted on' .the sleeve 5 andheld in place by the thrust collara according to the movement of the table newer element;y The Oear 7 therefore rotates firstin one direction and then in the other, the number of turns depending onpthe gear ratio between it and the power element from which it is driven. N otches8 in an annular adapted toy mesh` with the corners of a triangular. shaped spring pawlflO. .The pawl is mountedon a shaft V11 extending out be- Vyond the outer end of the sleeve and ending in a pinion 12.. A collar 13 mounted on the spindle has gear teeth 14 which mesh with the pinion 12 and thus control the operation of the pawl. A cover cap 15, on the collar, isr secured thereto .by a set screw 16. The end of the set screw lis extended toy engage a groove 17 in the outer periphery of the spindie-2. VThis extended end is the only means by which the Cover cap is held on the spindle and with the set screw removed both the cap and the collar may be l removed from the spindle.

The turning ofthe cover Cap, which may lar meshwith the pinion 12 which is on the.

pawl shaft. The pawl.v is adapted to 'be moved to ,three positions- In one position one corner of the pawl engages the inner` v notches 8 ofthe gearv 7 and as the gear turns in, for example, a clockwise direction, the

.sleeve 5 is Vcarried with it. When the gear turns vin the reverse direction the corner of thepawl slips along the notches without engaging. On the next subsequent rotation gaged in 'a notch as a yflat plate 18 with of the gear 7 the pawl corner is againensprings 19 set :in the sleeve bearingagainst the plate press against a latfside of the pawl and exert a tension to .force the corner into the notch. ByY turning the pawl shaft in a counterclockwise direction the 'opposite 'coriioA ner ot the pavvl is set and spring-pressed to engagement position so that counterclockwise movement of the gear 7 will carry the sleeve 5 in a. counterclockwise direction. When the paWl is in a Central position the sleeve 5 will be entirely out ot engagement with the gear. 7.

From the toregoinen description it becomes apparent that the construction of the gear ifion the Collar and the pinion l2 on the paWl shaft permits an increased movement of the cover over that which would be possible were the Cover to be provided With internal teeth operating directly on a pinion positioned on the end oitl the pani'l shaft. In other Words, this Would not be the CaseV it the pinion i2 were directly in mesh With an internal gear on the periphery ot the cap. The safety factor of the use of such a construction is obvious. Modilications of structure will occur to those skilled in the art Without departing from the principle involved in our invention.

' Having thus described our invention, what We claim as new and desire to secure by Letters Patent, is

l. In combination with a Clicker gear, and a Clicker gear pavvl, a paWl shaft, a cover cap, a spindle extending through the Clicker gear, a collar' rotatably mounted on the spindle, said spindle having an annular grooved gear on the Collar, a Clicker gear paWl and v paWl shaft, av pinion on the paivl shaft engaging the gear on the collar, a rotary Cap mounted on the collar and enclosing said pinion and gear on the Collar, and means rotatably connecting the cap and collar with the spindle.

3. In la Click box, the combination with a spindle, of a sleeve fixed on the spindle, a Clicker gear rotatable on the sleeve, a Collar rotatable on the spindle, a gear onthe collar, a Clicker gear pawl and pa-Wl shaft seated in the sleeve, a pinion on theA pawl shat't engaging the, gear on the collar, a rotary Cap mounted on the collar and enclos ing said pinion and gearfon the collar, and means' rotatably connecting the cap and collar with the spindle.

` RALPH HOHNHORST. EORGE LANGEN. 

